net.sf.jasperreports.engine.base.BaseReturnValue Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2014 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.base;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectInputStream.GetField;
import java.io.ObjectStreamClass;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.ReturnValue;
import net.sf.jasperreports.engine.type.CalculationEnum;
/**
* Base implementation of {@link net.sf.jasperreports.engine.ReturnValue ReturnValue}.
*
* @author Lucian Chirita ([email protected])
*/
public class BaseReturnValue extends BaseCommonReturnValue implements ReturnValue
{
/**
*
*/
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
/**
* The name of the variable to be copied.
*/
protected String fromVariable;
protected BaseReturnValue()
{
}
protected BaseReturnValue(ReturnValue returnValue, JRBaseObjectFactory factory)
{
super(returnValue, factory);
fromVariable = returnValue.getFromVariable();
}
/**
* Returns the name of the variable whose value should be copied.
*
* @return the name of the variable whose value should be copied.
*/
@Override
public String getFromVariable()
{
return this.fromVariable;
}
@Override
public Object clone()
{
return super.clone();
}
private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException
{
GetField fields = stream.readFields();
fromVariable = (String) fields.get("fromVariable", null);
// the fields of BaseCommonReturnValue were originally in this class.
// if deserializing an old object, we need to manually copy the values into the parent class.
ObjectStreamClass streamClass = fields.getObjectStreamClass();
if (streamClass.getField("toVariable") != null)
{
this.toVariable = (String) fields.get("toVariable", null);
}
if (streamClass.getField("calculation") != null)
{
this.calculation = (CalculationEnum) fields.get("calculation", null);
}
if (streamClass.getField("incrementerFactoryClassName") != null)
{
this.incrementerFactoryClassName = (String) fields.get("incrementerFactoryClassName", null);
}
}
}